A novel approach to determine the leading hadronic corrections to the muon g-2 is proposed. It consists in a measurement of the effective electromagnetic coupling in the space-like region. This method may become feasible at flavor factories resulting in a determination potentially competitive with the dispersive approach via time-like data.

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This talk is based on a work done in collaboration with C. Carloni Calame, M. Passera, and G. Venanzoni.

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